Air filter manifold



FIG. 1 is a perspective view showing the top, front and right sides of an air filter manifold embodying the new design;

FIG. 2 is a front side elevation view thereof;

FIG. 3 is a rear side elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a perspective view showing the top, front and right sides of the air filter manifold of FIG. 1, the Figure showing how the air filter manifold is attached to an air filter, the air filter shown in broken lines being for illustrative purposes only and forming no part of the claimed design. 

The ornamental design for an air filter manifold, as shown and described. 